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kumpel [21]
2 years ago
13

1. What element has 81 protons in the nuclei of its atoms?

Biology
1 answer:
lakkis [162]2 years ago
4 0
A little trick i learnt: The atomic number reflects how many electrons there are, and there must be an equal charge. therefore, there are the same amount of protons as there are electrons. so if it has 81 protons, we look for number 81 in the periodic table, Thallium
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Why is a shell considered to be biotic?
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A shell is considered as biotic (living) because it is a hard, rigid covering of many animals such as snail, sepia, pila, turtles, sea urchins. A shell is protective outer layer of these soft bodied animals.

4 0
3 years ago
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Explain the role that the skeletal system plays in facilitating cardiovascular system function
Arturiano [62]

Answer:

Skeletal system provide strength and protection to heart and also produces essential blood cells such as RBC and WBC

Explanation:

All organ systems in our body work in co-ordination with each other. Skeletal system comprised of bones and cartilages while cardiovascular system comprises of hearts, blood and blood vessels. Firstly the skeletal system protects the heart and also assists in its pumping along with muscle. Secondly, the blood cells such as RBC and WBC are circulated by the blood throughout the body. However these cells are produced in the bone marrow (inside the bones)  

4 0
2 years ago
Antidiuretic hormone (ADH) and the renin-angiotensin-aldosterone system (RAAS) work together in maintaining osmoregulatory homeo
julsineya [31]

Answer:

The correct answer will be- ADH alters the reabsorption of water and RAAS leads to the reabsorption of sodium ions.

Explanation:

To maintain the osmolarity of the blood in the human body, the body activates the RAAS pathway and the production of ADH.

RAAS pathway gets activated when the receptors sense low blood pressure in the body. This activates the production of renin from the juxtaglomerular cells of the body which converts the angiotensin to angiotensin I and later angiotensin II.

This allows the reabsorption of sodium ions in the blood through proximal and distal tubules in the nephron.  This activates the synthesis of aldosterone which increase the permeability to sodium ions.

The Antidiuretic hormone helps regulate the low blood pressure by adding aquaporins to the distal tubule membrane which help absorb the water.

Thus, ADH alters the reabsorption of water and RAAS leads to the reabsorption of sodium ions is the correct

6 0
2 years ago
hypothesize a mechanism to explain how tissues respond to insulin in different ways, even tisses that have the same amount of re
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I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

</span>
4 0
3 years ago
Read 2 more answers
Drag each label to the correct location on the image.
krok68 [10]

Answer in picture below:

Base on the given:

if the line goes down = decrease/bad

if the line goes up = increase/good

<u><em>~Lenvy~</em></u>

8 0
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